4.5 Article

Cytotoxin antibody-based colourimetric sensor for field-level differential detection of elapid among big four snake venom

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PLOS NEGLECTED TROPICAL DISEASES
卷 15, 期 10, 页码 -

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PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pntd.0009841

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  1. Biotechnology Industry Research Assistance Council (BIRAC) [BIRAC/BT/AIR0347/PACE-13/17]

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The lateral flow kit developed can specifically detect the venom of Indian cobra and common krait, with high sensitivity, and shows no immunoreactivity against viperidae snakes in the big four venomous snakes.
Development of a rapid, on-site detection tool for snakebite is highly sought after, owing to its clinically and forensically relevant medicolegal significance. Polyvalent antivenom therapy in the management of such envenomation cases is finite due to its poor venom neutralization capabilities as well as diagnostic ramifications manifested as untoward immunological reactions. For precise molecular diagnosis of elapid venoms of the big four snakes, we have developed a lateral flow kit using a monoclonal antibody (AB1; IgG(1) - kappa chain; Kd: 31 nM) generated against recombinant cytotoxin-7 (rCTX-7; 7.7 kDa) protein of the elapid venom. The monoclonal antibody specifically detected the venoms of Naja naja (p < 0.0001) and Bungarus caeruleus (p<0.0001), without showing any immunoreactivity against the viperidae snakes in big four venomous snakes. The kit developed attained the limit of quantitation of 170 pg/mu L and 2.1 ng/mu L in spiked buffer samples and 28.7 ng/mu L and 110 ng/mu L in spiked serum samples for detection of N. naja and B. caeruleus venoms, respectively. This kit holds enormous potential in identification of elapid venom of the big four snakes for effective prognosis of an envenomation; as per the existing medical guidelines.

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